I felt that kind of thing could have been in Ciel and Arcueid's respective routes, since the two of them were actively trying to obliterate each-other and undermine each-other's efforts, as both had different goals, and you end up killing, or at least helping kill, whichever of the two you didn't end up with. I mean: Although, even though I think it would highlight the more tragic elements - losing a good friend/potential love to death's grip because of a different or potentially wrong choice - I can guess that some would complain about it having too much in common with the other routes, which I can understand.
Lastly... which of the heroines did you prefer from Tsukihime? I picked Ciel (True route ending.) (Though with how I brought up wanting an option where Arcueid dies, you probably found that a rather obvious sentence, and I'm ready for whatever response people are likely even now making towards my - and I fully admit this - dislike of the character. Or maybe that's just me being paranoid).
Addendum: Found the proof of the Remake!
http://seventhstyle.com/2014/02/07/tsukihime-visual-novel-remake-artwork/
Though, I have to admit, IDK what to feel about the character designs - I like them, that's for sure, but like the author of the post said, I can't help but notice how close a resemblance the redesigned Arcueid has to Saber from Fate/Stay Night.
Yeah the remake was announced back in 2008(if i remember correctly),i'm still waiting though...
I would prefer they made a "Childhood arc" from the point of view of SHIKI,oh and i would like the Sacchin route to be the "canon" route.
I like girls with glasses and heterochromia